Yak-52  V-Speeds 
 

Vr	49 kt
	
Vlof	60 kt
	
Acc to 	86 kts	
		
Vne	226 kt	
		
Vmo	194 kt	
		
Glide	K=7     Gear up or down	13000 ft -> 15 nm
		
Vs	57 kt	
		
Vsf	54 kt	
		
Vs inv	76 kt	
		
Vref	86 kts	Flaps DOWN
		
Vref	92	Flaps UP


Source:Aerobuild Manual